Well, I think you can just use the entire range, right.
=VLOOKUP(A1,$A:$B,2,FALSE)
Maybe you are talking about a dynamic range... Check these out:
http://www.ozgrid.com/Excel/DynamicRanges.htm
http://www.contextures.com/xlNames01.html
http://www.contextures.com/xlNames02.html
Regards,
Ryan--

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RyGuy
> Hi
> I need to the syntax for running a Vlookup on a fixed array, but each time
> the size of the array is changing. is there any command for this or can i use
> a variable that will stand for range each time?